Re: cmpci: dma buffer crosses 64k boundary

Alan Cox (alan@lxorguk.ukuu.org.uk)
Mon, 27 Dec 1999 22:01:59 +0000 (GMT)

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> From: Alan Cox <alan@lxorguk.ukuu.org.uk>
> > 2.2.x had the property that ISA DMA get free pages always aligned on power
> > of two boundaries equivalent to the size.
>
> The kernel stack is allocated with gfp(,1), and it must be 8192 byte
> aligned, otherwise the 'current' macro would fail.
>
> I think we must continue to guarantee that x-byte allocations are aligned on
> x-byte boundaries.

This is no longer true for GFP_DMA allocations from my testing

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